Good pretty Cluster Suite and GFS document

http://www.redhat.com/docs/en-US/Red_Hat_Enterprise_Linux/5.2/html/Cluster_Suite_Overview/index.html

http://www.redhat.com/docs/en-US/Red_Hat_Enterprise_Linux/5.2/html/Cluster_Administration/index.html

http://www.redhat.com/docs/en-US/Red_Hat_Enterprise_Linux/5.2/html/Cluster_Logical_Volume_Manager/index.html

http://www.redhat.com/docs/en-US/Red_Hat_Enterprise_Linux/5.2/html/Global_File_System/index.html

http://www.redhat.com/docs/en-US/Red_Hat_Enterprise_Linux/5.2/html/Global_Network_Block_Device/index.html

http://www.redhat.com/docs/en-US/Red_Hat_Enterprise_Linux/5.2/html/DM_Multipath/index.html

http://www.redhat.com/docs/en-US/Red_Hat_Enterprise_Linux/5.2/html/Online_Storage_Reconfiguration_Guide/index.html